Axial ERS

An axial ERSfixture is named as such because the lamp sits on the axis of the elliptical reflector. This means that lamp enters from the rear of the instrument. This configuration is more efficient than its counterpart, the [[Radial ERS]] because the lamps and filaments can be more compact, and there is more reflector surface. The closer that the lamp gets to being a point source, the more efficient the light is.